{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2017:O4U4HH6VYLQF2DLKROXRYWGKVM","short_pith_number":"pith:O4U4HH6V","schema_version":"1.0","canonical_sha256":"7729c39fd5c2e05d0d6a8baf1c58caab36d418cd48578bb5c24b457a36093adb","source":{"kind":"arxiv","id":"1707.08267","version":1},"attestation_state":"computed","paper":{"title":"$^{13}$C isotopic fractionation of HC$_{3}$N in two starless cores: L1521B and L134N (L183)","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"Hiroyuki Ozeki, Kotomi Taniguchi, Masao Saito","submitted_at":"2017-07-26T01:32:09Z","abstract_excerpt":"We observed the $J=5-4$ rotational lines of the normal species and three $^{13}$C isotopologues of HC$_{3}$N at the 45 GHz band toward two low-mass starless cores, L1521B and L134N (L183), using the Nobeyama 45 m radio telescope in order to study the main formation pathways of HC$_{3}$N in each core. The abundance ratios of the three $^{13}$C isotopologues in L1521B are derived to be [H$^{13}$CCCN]:[HC$^{13}$CCN]:[HCC$^{13}$CN] = 0.98 (+- 0.14) : 1.00 : 1.52 (+- 0.16) (1 sigma). The fractionation pattern is consistent with that at the cyanopolyyne peak in Taurus Molecular Cloud-1. This fractio"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1707.08267","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-07-26T01:32:09Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"d21e57c79c5306cfdb32e1f621aeefef4a705415bbd422499513eb1bc10714fe","abstract_canon_sha256":"d2486f11eccd93d627471e248e1c5dabbcb9ea936c52dd4f1c3caac60aeaf564"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:36:02.872437Z","signature_b64":"kcTyU33xfPIcLqVubx31x5CQsIEDbc44b1DcXlozxzfvjL/gDOHPKo53KGmZ3Sa3ERvR4A2rEYgTJlgmjDXeBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7729c39fd5c2e05d0d6a8baf1c58caab36d418cd48578bb5c24b457a36093adb","last_reissued_at":"2026-05-18T00:36:02.872032Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:36:02.872032Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"$^{13}$C isotopic fractionation of HC$_{3}$N in two starless cores: L1521B and L134N (L183)","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"Hiroyuki Ozeki, Kotomi Taniguchi, Masao Saito","submitted_at":"2017-07-26T01:32:09Z","abstract_excerpt":"We observed the $J=5-4$ rotational lines of the normal species and three $^{13}$C isotopologues of HC$_{3}$N at the 45 GHz band toward two low-mass starless cores, L1521B and L134N (L183), using the Nobeyama 45 m radio telescope in order to study the main formation pathways of HC$_{3}$N in each core. The abundance ratios of the three $^{13}$C isotopologues in L1521B are derived to be [H$^{13}$CCCN]:[HC$^{13}$CCN]:[HCC$^{13}$CN] = 0.98 (+- 0.14) : 1.00 : 1.52 (+- 0.16) (1 sigma). The fractionation pattern is consistent with that at the cyanopolyyne peak in Taurus Molecular Cloud-1. This fractio"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.08267","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"1707.08267","created_at":"2026-05-18T00:36:02.872095+00:00"},{"alias_kind":"arxiv_version","alias_value":"1707.08267v1","created_at":"2026-05-18T00:36:02.872095+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.08267","created_at":"2026-05-18T00:36:02.872095+00:00"},{"alias_kind":"pith_short_12","alias_value":"O4U4HH6VYLQF","created_at":"2026-05-18T12:31:34.259226+00:00"},{"alias_kind":"pith_short_16","alias_value":"O4U4HH6VYLQF2DLK","created_at":"2026-05-18T12:31:34.259226+00:00"},{"alias_kind":"pith_short_8","alias_value":"O4U4HH6V","created_at":"2026-05-18T12:31:34.259226+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/O4U4HH6VYLQF2DLKROXRYWGKVM","json":"https://pith.science/pith/O4U4HH6VYLQF2DLKROXRYWGKVM.json","graph_json":"https://pith.science/api/pith-number/O4U4HH6VYLQF2DLKROXRYWGKVM/graph.json","events_json":"https://pith.science/api/pith-number/O4U4HH6VYLQF2DLKROXRYWGKVM/events.json","paper":"https://pith.science/paper/O4U4HH6V"},"agent_actions":{"view_html":"https://pith.science/pith/O4U4HH6VYLQF2DLKROXRYWGKVM","download_json":"https://pith.science/pith/O4U4HH6VYLQF2DLKROXRYWGKVM.json","view_paper":"https://pith.science/paper/O4U4HH6V","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1707.08267&json=true","fetch_graph":"https://pith.science/api/pith-number/O4U4HH6VYLQF2DLKROXRYWGKVM/graph.json","fetch_events":"https://pith.science/api/pith-number/O4U4HH6VYLQF2DLKROXRYWGKVM/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/O4U4HH6VYLQF2DLKROXRYWGKVM/action/timestamp_anchor","attest_storage":"https://pith.science/pith/O4U4HH6VYLQF2DLKROXRYWGKVM/action/storage_attestation","attest_author":"https://pith.science/pith/O4U4HH6VYLQF2DLKROXRYWGKVM/action/author_attestation","sign_citation":"https://pith.science/pith/O4U4HH6VYLQF2DLKROXRYWGKVM/action/citation_signature","submit_replication":"https://pith.science/pith/O4U4HH6VYLQF2DLKROXRYWGKVM/action/replication_record"}},"created_at":"2026-05-18T00:36:02.872095+00:00","updated_at":"2026-05-18T00:36:02.872095+00:00"}